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  • 1
    Digitale Medien
    Digitale Medien
    Changes in the basal ganglia and thalamus following reperfusion after complete cerebral ischaemia (1994)
    Springer
    Neuroradiology 36 (1994), S. 605-607 
    Details
    ISSN: 1432-1920
    Schlagwort(e): Magnetic resonance imaging ; Basal ganglia ; Thalamus ; Complete cerebral ischaemia ; Cardiac arrest
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract We report specific changes bilaterally in the basal ganglia and thalamus following reperfusion after complete cerebral ischaemia. A 69-year-old man, resuscitated after cardiac arrest, showed symmetrical lowdensity lesions in the head of the caudate nucleus and lentiform nucleus on CT. MRI revealed methaemoglobin derived from minor haemorrhage in the basal ganglia and thalamus, not evident on CT. We suggest that this haemorrhage results from diapedesis of red blood cells through the damaged capillary endothelium following reperfusion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00600418
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  • 2
    Digitale Medien
    Digitale Medien
    Bilateral organized chronic subdural haematomas: High field magnetic resonance images and histological considerations (1994)
    Springer
    Acta neurochirurgica 131 (1994), S. 265-269 
    Details
    ISSN: 0942-0940
    Schlagwort(e): Organized chronic subdural haematoma ; high field MRI ; histology ; growth mechanism
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The authors describe a 66-year-old man with progressive gait disturbance caused by bilateral organized chronic subdural haematomas. The characteristics of these lesions on magnetic resonance (MR) images have not yet been clarified. The organized haematoma in our patient exhibited slight hypo-intensity on T 1-weighted MR images and marked hypo-intensity on T 2-weighted MR images obtained at 1.5 T. Preoperative MR imaging may give us useful information about surgical strategy in the case of chronic subdural haematoma with an unusual appearance on computed tomographic (CT) scans.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01808625
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  • 3
    Digitale Medien
    Digitale Medien
    Cystic meconium peritonitis: ultrasonographic features (1984)
    Springer
    Pediatric radiology 14 (1984), S. 18-22 
    Details
    ISSN: 1432-1998
    Schlagwort(e): Meconium ; Peritonitis ; Ultrasonics ; Intestinal perforation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Meconium peritonitis occasionally occurs as a localized, encysted collection of meconium ranging from a few centimeters in size to huge cysts occupying most of the abdominal cavity. The cyst wall consists of fibrous granulation tissue and the cyst may contain only meconium or may also encase loops of bowel. Gas within the cyst indicates persistent communication between the perforated bowel and the cyst cavity; if the perforation seals over in utero the cyst remains gasless. Calcification is a variable finding. Sonography in two neonates with cystic meconium peritonitis showed well-defined, echogenic masses, one of which contained calcifications and was detected in utero.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02386725
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  • 4
    Digitale Medien
    Digitale Medien
    Isomeric yield ratios of fission products in the system of 24 MeV proton-induced fission of238U (1993)
    Springer
    The European physical journal 347 (1993), S. 53-62 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.85.Ge
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Isomeric yield ratios of 30 fission products in 24 MeV proton-induced fission of238U were measured by the use of the ion-guide isotope separator on-line. The obtained isomeric yield ratios were converted to the angular momenta of primary fission fragments based on the statistical model. The deduced angular momenta were examined from various aspects. It is found that in general the angular momentum continuously increases with the fragment mass number including the region of symmetric mass division. However, there are some exceptions. For Sn isotopes the deduced angular momenta are quite small due to the spherical shape of the nuclear shell configuration. It is also concluded from the consideration of the charge distribution that the angular momentum of fission product scatters considerably within the narrow range of mass division. The dependence of the angular momentum on the available energy of fragments at scission point indicates that the individual fragment possesses a characteristic deformation at scission and/or the deduced angular momentum is seriously affected by the particle excitation after scission.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01301277
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  • 5
    Digitale Medien
    Digitale Medien
    Nuclearg-factors of the 1229 and 2911 keV isomers in143Nd (1994)
    Springer
    The European physical journal 348 (1994), S. 173-176 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 21.10.Ky ; 23.20.−g ; 27.60.+j
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Nuclearg-factors of the 1229 keV 13+/2 and 2911 keV 21+/2 level and the half-life of the 1229 keV level have been measured to beg(1229)=0.058(5),g(2911)=0.69(12) andT 1/2 (1229)=6.79(2) ns. The experimental g-factors show that the 1229 keV level has a dominant configuration of (ρf 7/2⊗3−), and the 2911 keV level has an almost pure (ρf 7/2⊗7−), configuration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01291914
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  • 6
    Digitale Medien
    Digitale Medien
    Pseudoweb of the gastric antrum in infants (1980)
    Springer
    Pediatric radiology 9 (1980), S. 73-75 
    Details
    ISSN: 1432-1998
    Schlagwort(e): Antral web ; Gastric outlet obstruction ; Flexible fiberoptic gastroscopy ; Incomplete pyloric diaphragm ; Incomplete antral membrane
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Two infant boys, one 3 months of age and the other 8 weeks of age, with symptoms suggesting gastric outlet obstruction had upper gastrointestinal fluororadiographic examinations which showed typical signs for gastric antral webs (diaphragms or membranes), but neither had actual webs as proven by surgery in one and by endoscopy in the other. The report emphasizes the possibility of falsely positive radiographic findings, which can be tested by potentially corroborative fiberoptic endoscopy, thus avoiding unnecessary surgery.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00977668
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  • 7
    Digitale Medien
    Digitale Medien
    Acylcarnitine profile in tissues and body fluids of biotin-deficient rats with and withoutl-carnitine supplementation (1994)
    Springer
    Journal of inherited metabolic disease 17 (1994), S. 678-690 
    Details
    ISSN: 1573-2665
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Since biotin-deficient (BD) rats are a good animal model for human multiple carboxylase deficiency and have low plasma free carnitine levels, short-chain acylcarnitine profiles in biotin-deficient rats withl-carnitine supplementation (BDC rats) and BD rats were investigated by fast-atom bombardment and tandem mass spectrometry and gas chromatography/mass spectrometry. By the latter method, 3-hydroxyisovalerylcarnitine was identified in BD rats, and showed the greatest accumulation among short-chain acylcarnitines in tissues of BD rats, while the tissue levels of propionic acid were more markedly elevated than those of 3-hydroxyisovaleric acid. The tissue levels of 3-hydroxyisovaleryl-carnitine were significantly lower and those of propionyl-carnitine were somewhat higher in BDC rats than in BD rats, while the tissue levels of propionic acid and 3-hydroxyisovaleric acid in BDC rats were lower than those in BD rats. These changes were more apparent in kidney than in other tissues. The amounts of urinary excretion of acylcarnitines were markedly larger, and those of 3-hydroxyisovaleric acid were somewhat smaller in BDC rats than in BD rats, while those of propionic acid were very low in BD and BDC rats as compared with those of 3-hydroxyisovaleric acid. It seems that the relationship between the concentrations of 3-hydroxyisovalerylcarnitine and those of propionylcarnitine reflects the unique metabolism of the related metabolites in tissues, especially in kidney, which may be influenced by their urinary excretion and the availability of free carnitine. These data in biotin deficiency suggest that carnitine supplementation is possibly beneficial for patients with holocarboxylase synthetase deficiency who respond incompletely to biotin therapy.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00712010
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  • 8
    Digitale Medien
    Digitale Medien
    Internal conversion of valence shell electrons: Measurement and analysis for the 10.84 keV transition in206Bi (1981)
    Springer
    The European physical journal 299 (1981), S. 283-290 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Conversion electrons of the 10.84 keV transition in206Bi were measured with the iron-free magnetic spectrometer. The conversion line of the valence shell was observed to be narrower than those of the inner ones. The computer program which optimizes the line profiles given numerically is outlined and used for the spectrum analysis. The studied transition was proved to be pure M1 with the nuclear structure parameterλ=1.7±0.7. The internal conversion coefficients were calculated using the relativistic Hartree-Fock model for neutral atoms as well as various isolated ions. Altogether, 15 different valence-shell configurations were considered. The prediction for the 6s 1 2/2 configuration (Bi3+) is in accord with the measured conversion intensities. This is consistent with probable chemical form Bi2O3 of bismuth atoms in the radioactive source.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01441269
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  • 9
    Digitale Medien
    Digitale Medien
    In-beam study of the level crossing resonance on the 4 μs 2 9+ isomer of69Ge in a Zn single crystal (1983)
    Springer
    Hyperfine interactions 14 (1983), S. 315-331 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The time-integral angular distribution was measured as a function of an external magnetic field for γ-rays from the 398 keV 2 9+ state of69Ge populated by bombarding a Zn single crystal with a natural α-beam from a cyclotron. Clear resonances of dispersion as well as Lorentz type having a narrow width consistent with the natural width (τ=4 μs) were observed at Bres=9.15 kG corresponding to the first level-crossing resonance of the 2 9+ state due to the combined collinear magnetic and quadrupole interactions. The effects of noncollinearity were also demonstrated and compared with theory. As an application of this resonance method, the temperature dependence of the quadrupole interaction frequency was measured.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02043304
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  • 10
    Digitale Medien
    Digitale Medien
    Determination of the change of nuclear charge radius of the119Sn Mössbauer transition by internal conversion (1984)
    Springer
    Hyperfine interactions 20 (1984), S. 305-325 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Radioactive119Sb was implanted into six host matrices (CaSnO3, Pt, Y, Au,Β-Sn, Pb) and internal conversion electrons of the 23.87 keV transition in119Sn were measured with an iron-free magnetic spectrometer as well as Mössbauer spectra. In the analysis of the conversion spectra of outermost electrons, the overlapping K-LM Auger lines were subtracted using the Auger spectrum of tin measured with another source of117mSn, and the shake-off effect accompanying the conversion process was considered. From the correlation between the Mössbauer isomer shifts and the intensity ratios of O-shell to N1-shell conversion electrons, the change of the nuclear charge radius of the 23.87 keV transition of119Sn was deduced to be δR/R=(0.87 ± 0.25) × 10−4 for a uniform charge distribution ofR= 1.2 ×A 1/3 fm or, equivalently, δ 〈r2〉—=(3.6 ± 1.0) ×10−3 fm2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02069379
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